Journal of Magnetism and Magnetic Materials
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#1Iordana Astefanoaei (UAIC: Alexandru Ioan Cuza University)H-Index: 8
#2Alexandru Stancu (UAIC: Alexandru Ioan Cuza University)H-Index: 31
Abstract null null The magnetic nanoparticles (MNP) with special (thermal and magnetic) properties are essential in Magnetic Hyperthermia. As heating sources of tissues when an external alternating magnetic field is applied, these magnetic nanosystems have the capability to destroy the malignant tissues. In this paper, a comparative temperature analysis was done for three types of the magnetic materials (magnetite, maghemite and FePt) with the same magnetic field parameters. A complex model of t...
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Abstract null null We report on the elastic and magnetic properties of multiferroic Tb0.3Mn20.9O78.8 thin films. The films were deposited on (0 0 1) Si using radio frequency magnetron (RF) sputtering at 50 W and ambient temperature. The elastic properties have been established by surface Brillouin scattering (SBS) after fitting the discrete phonon dispersion in the k||d range of 0 – 5 by surface Elastodynamic Green’s function. The uncertainties in elastic constants values were obtained from Tayl...
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Abstract null null This work investigates the effect of different initial microstructures on the electromagnetic magnetisation curves/hysteresis of 50CrMo4 steel and technically pure iron introducing a novel measurement method. Surprisingly little is known about the relationship between microstructure and the magnetic properties, although this is of great importance for a better understanding and multi-physics modelling of induction heat treatment. Analysis of the magnetic hysteresis and Distort...
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#1Arup Ghosh (NUS: National University of Singapore)H-Index: 13
#2Amit Chanda (NUS: National University of Singapore)H-Index: 3
Last. Ramanathan Mahendiran (NUS: National University of Singapore)H-Index: 38
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Abstract null null Here, we report the Nernst thermopower (Sxy)- generation of a dc electrical voltage transverse to the applied temperature gradient and magnetic field- in the ferromagnetic metallic oxide series: R0.6Sr0.4CoO3 for rare earth cations (R = La, Pr and Nd) of different ionic radii. Besides Sxy, longitudinal thermopower (Sxx) and resistivity in absence of an external magnetic field were also measured. In each of these samples, Sxy increases rapidly around the ferromagnetic Curie tem...
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#1Marilia Silva (IST: Instituto Superior Técnico)H-Index: 3
#2Diana C. Leitao (IST: Instituto Superior Técnico)H-Index: 18
Last. Paulo P. FreitasH-Index: 68
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Abstract null null In highly sensitive magnetic sensors coupled to magnetic flux concentrators, the optimal operation point with maximum sensitivity may appear deviated from zero magnetic field. Such characteristic can hamper the detection of very low magnetic fields. In this work a magnetic bias technique is presented which allows an efficient control of the operation point of the magnetoresistive sensor placed in the gap of two magnetic flux concentrators. Specifically, the magnetic field crea...
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Abstract null null A skyrmionium or 2 null null null π null null null null skyrmion is an exotic magnetic configuration that can be stabilized in ferromagnetic nanostructures, e.g., nanodisks. Differently from the standard (or null null null null π null null null ) skyrmion, it can move without suffering deflections due to the skyrmion Hall effect (SkHE), a property that is desirable for potential applications in spintronics. In this work, using micromagnetic simulations, it is investigated the ...
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Abstract null null We present the structural characterization, valence change of Fe, Raman spectra, and magnetic and microwave shielding properties of polycrystalline SrFe12-xZnxO19 (x = 0–1) samples. X-ray diffraction and Raman analyses indicated the samples having the M-type hexaferrite structure. The Zn doping caused a remarkable change in the lattice constants. Investigating magnetic hysteresis loops, we found an enhanced saturation magnetization (Ms) as increasing x from 0 to 0.1, and a red...
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Abstract null null Accurate and fast characterization of hysteretic systems can accelerate progress in fields as diverse as biomedicine, sensors, data storage, and logic devices. Here, we introduce a fast approach to determine magnetic parameters (intrinsic coercivities of elementary domains, interaction fields between the domains, and the variances of both) of bistable hysteretic systems. The approach uses the first few points in first-order reversal curves (FORC) to mathematically and empirica...
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Abstract null null Recently, preparation of lightweight absorbers with high performance capability are urgently needed for practical demanded in order to solve the severe electromagnetic pollution. In the present study, two different composites (Fe3O4/carbon fiber and Fe3O4/rGO) were uniformly incorporated into resin epoxy matrix to obtain single and double layer X-band absorber with 20 wt% filler loading. Each of the composites were prepared via solvothermal process. According to the results, t...
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